Opening the iTunes Store.If iTunes doesn’t open, click the iTunes icon in your Dock or on your Windows desktop.Progress Indicator
Opening the iBooks Store.If iBooks doesn't open, click the iBooks app in your Dock.Progress Indicator

iTunes is the world's easiest way to organize and add to your digital media collection.

We are unable to find iTunes on your computer. To buy and download ND1 by Naive Design, get iTunes now.

Do you already have iTunes? Click I Have iTunes to open it now.

I Have iTunes Free Download
iTunes for Mac + PC


By Naive Design

Open iTunes to buy and download apps.


ND1 is an advanced, programmable RPL/RPN calculator that can calculate with numbers, complex numbers, fractions, vectors, matrices, strings, images, algebraic expressions, and other types of objects.

Over 500 operators deliver a total of over 2,000 functions across all object types.

In many ways, ND1 is a modern day update to the RPL calculator line from HP (28, 48-50g).

It offers RPL, RPL+, JavaScript, networking, and modern graphics (HTML5) and storage (a database with local and cloud backing). ND1 has an unlimited stack.

Try ND0 before you buy, if you're unsure ND1 is for you.

There's plenty of documentation for ND1.

Please see the support website for full specs, a "Quick Tour", tutorials, reference documentation, and a discussion forum, where support can be found.

What's New in Version 1.5.1

- Expanding the calc is back for iOS 7
- New preference for hiding toolbar
- Fixes (iOS 6 double-tap, Ans, more)

iPhone Screenshot

iPhone Screenshot 1
iPhone Screenshot 2
iPhone Screenshot 3
iPhone Screenshot 4
iPhone Screenshot 5
View In iTunes
  • S$ 3.98
  • Category: Education
  • Updated:
  • Version: 1.5.1
  • Size: 1.3 MB
  • Languages: English, Dutch, French, German, Japanese, Spanish
  • Developer:

Compatibility: Requires iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimised for iPhone 5.

Customer Ratings

We have not received enough ratings to display an average for the current version of this application.